Agilent U8030A Series Triple Output DC Power Supply Service Guide Agilent Technologies
Notices © Agilent Technologies, Inc. 2012 Warranty No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws. The material contained in this document is provided “as is,” and is subject to change, without notice, in future editions.
Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument. Caution, risk of danger (refer to this manual for specific Warning or Caution information) In position of a bi-stable push control DC (Direct current or voltage) Terminal is at earth potential. Used for measurement and control circuits designed to be operated with one terminal at earth potential.
Safety Considerations Read the information below before using this instrument. The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements.
Environmental Conditions This instrument is designed for indoor use and in an area with low condensation. The table below shows the general environmental requirements for this instrument.
Regulatory Markings VI The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives. The C-tick mark is a registered trademark of the Spectrum Management Agency of Australia. This signifies compliance with the Australia EMC Framework regulations under the terms of the Radio Communication Act of 1992. ICES/NMB-001 indicates that this ISM device complies with the Canadian ICES-001.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument” product. The affixed product label is as shown below.
Declaration of Conformity (DoC) The Declaration of Conformity (DoC) for this instrument is available on the Agilent website. You can search the DoC by its product model or description at the web address below. http://regulations.corporate.agilent.com/DoC/search.htm NOTE VIII If you are unable to search for the respective DoC, please contact your local Agilent representative.
Table of Contents 1 Calibration Procedures Agilent Calibration Services 2 Calibration interval 2 Other recommendations for calibration Recommended Test Equipment Test Considerations 2 3 5 Measurement Techniques 6 Performance Verification Tests 10 Constant voltage (CV) verification Constant current (CC) verification 10 17 Performance Test Record for U8031A 23 Performance Test Record for U8032A 26 Using the Front Panel for Adjustments 29 Calibration procedure 29 Restarting the calibration procedu
2 Service and Maintenance Troubleshooting 38 Line Voltage Conversion Self-Test Procedure 39 40 Returning the Instrument for Service Replaceable Parts 42 To order replaceable parts 41 43 Types of Service Available 44 Extended service contracts 44 Obtaining Repair Service (Worldwide) X 45 U8030A Series Service Guide
List of Figures Figure 1-1 Figure 1-2 Figure 1-3 Figure 1-4 Figure 1-5 Figure 1-6 Figure 2-1 U8030A Series Service Guide Test setup (A) 6 Test setup (B) 6 Test setup (C) 7 Test setup (D) 8 Binding post side view 9 Graph of load transient response 17 Orientation of voltage selector for different voltage selection 39 XI
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List of Tables Table 1-1 Table 1-2 Table 1-3 Table 1-4 Table 1-5 Table 1-6 Table 1-7 Table 2-1 Table 2-2 Table 2-3 U8030A Series Service Guide Recommended test equipment 3 U8031A CV performance test record 23 U8031A CC performance test record 24 U8032A CV performance test record 26 U8032A CC performance test record 27 List of system error codes 35 List of power channel error codes 35 Operating checklist 38 Line voltage fuse rating indicator for U8031A/U8032A 40 Replaceable parts for U8031A/U8032A 42 XIII
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U8030A Series Triple Output DC Power Supply Service Guide 1 Calibration Procedures Agilent Calibration Services 2 Calibration interval 2 Other recommendations for calibration 2 Recommended Test Equipment 3 Test Considerations 5 Measurement Techniques 6 Performance Verification Tests 10 Constant voltage (CV) verification 10 Constant current (CC) verification 17 Performance Test Record for U8031A 23 Performance Test Record for U8032A 26 Using the Front Panel for Adjustments 29 Calibration procedure 29 Restar
1 Calibration Procedures Agilent Calibration Services Agilent Calibration Services When your instrument is due for calibration, contact your local Agilent Service Center for recalibration. See “Types of Service Available” on page 44 for more information on the various calibration services offered. Calibration interval The instrument should be calibrated on a regular interval determined by the measurement accuracy requirements of your application. A one- year interval is adequate for most applications.
Calibration Procedures Recommended Test Equipment 1 Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures is listed below in Table 1- 1. If the exact instrument is not available, substitute with another calibration standard of equivalent accuracy.
1 Calibration Procedures Recommended Test Equipment Table 1-1 Recommended test equipment (continued) Equipment Requirement(s) Resistive load (RL) • 5 Ω/180 W (for U8031A) • 20 Ω/180 W (for U8032A) • 1.67 Ω/15 W (for 5 V Output 3) Current monitoring resistor (shunt) (RM) • 0.01 Ω ± 0.1% • TCR less than 20 ppm/ºC Recommended model Purpose Used[1] - Measures ripple and noise PV ISOTEK Co.
Calibration Procedures Test Considerations 1 Test Considerations For optimum performance, all procedures should comply with the following recommendations: • Ensure that the calibration ambient temperature is stable and is recommended at 23 °C ± 2 °C. • Ensure that the ambient relative humidity is less than 80%. • Allow a warm- up period of 1 hour by powering on the power supply. During the warm- up period, set the power supply to its maximum programmable voltage and current. Then, enable the output.
1 Calibration Procedures Measurement Techniques Measurement Techniques Test setup Most tests are performed at the front terminals as shown below. Measure the DC voltage directly at the positive (+) and negative (–) terminals on the front panel.
Calibration Procedures Measurement Techniques + 1 – Load resistor BNC BNC + – Differential amplifier output BNC 50 Ω termination Input scope or RMS voltmeter Figure 1-3 Test setup (C) U8030A Series Service Guide 7
1 Calibration Procedures Measurement Techniques + – Load resistor TCP305 BNC TCPA300 BNC AC/DC converter 50 Ω termination Differential amplifier output BNC 50 Ω termination RMS voltmeter Figure 1-4 Test setup (D) Current monitoring resistor To eliminate output current measurement error caused by the voltage drops in the leads and connections, connect the current monitoring resistor (RM) between the (–) output terminal and the load as a four- terminal device.
Calibration Procedures Measurement Techniques 1 General measurement techniques To achieve best results when measuring load regulation, peak to peak voltage, and transient response time of the power supply, measuring devices must be connected through the hole in the neck of the binding post at (A) while the load resistor is plugged into the front of the output terminals at (B). A measurement made across the load includes the impedance of the leads to the load.
1 Calibration Procedures Performance Verification Tests Performance Verification Tests Use the performance verification tests to verify the measurement performance of the instrument. The performance verification tests use the instrument's specifications listed in the U8030A Series User's Guide (available for download at www.agilent.com/find/U8030). The performance verification tests are recommended as acceptance tests when you first receive the instrument.
Calibration Procedures Performance Verification Tests 1 5 Wait a few seconds for the output of the power supply to settle. Ensure that the power supply is in the CV mode. 6 Record the voltage reading on the multimeter (VDMM). This value should be within the limit of • 0 V ± 15 mV for Output 1 and Output 2, and • 0 V ± 0.25 V for Output 3. 7 When the power supply is in the meter mode, record the voltage reading shown on the power supply.
1 Calibration Procedures Performance Verification Tests CV load effect (load regulation) This test measures the change in the output voltage resulting from a change in the output current from full load to no load or vice versa. Procedure: 1 Power off the power supply, and connect a multimeter between the (+) and (–) terminals of the output as shown in Figure 1- 1. 2 Power on the power supply. 3 When the power supply is in the limit mode, program the output voltage to its full rated value (i.e.
Calibration Procedures Performance Verification Tests 1 CV source effect (line regulation) This test measures the change in the output voltage that results from a change in the AC line voltage from its minimum value to its maximum value. Procedure: 1 Power off the power supply, and connect a multimeter between the (+) and (–) terminals of the output to be tested as shown in Figure 1- 1. 2 Connect the AC power line through an AC voltage source.
1 Calibration Procedures Performance Verification Tests 9 The difference between the multimeter readings in step 7 and step 8 should be within the limit of • 5 mV for U8031A, • 8 mV for U8032A, and • ≤ 5 mV for Output 3. Line voltage, Vac Low line voltage limit, Vac High line voltage limit, Vac 100 90 110 115 104 127 230 207 253 CV noise CV noise is specified as the RMS or peak- to- peak output voltage in the frequency range from 20 Hz to 20 MHz.
Calibration Procedures Performance Verification Tests 1 6 Configure the differential amplifier as follows. • Enable the AC mode (positive and negative) to remove the DC component • Enable the differential mode • Set the gain to ×10 • Set the attenuation to 1 • Set the low- pass filter to 20 MHz bandwidth limit to filter out input signals that contain higher frequencies • Enable the zero precision voltage generator • Set the input impedance to 50 Ω 7 Configure the scope as follows.
1 Calibration Procedures Performance Verification Tests 11 Disconnect the oscilloscope, and connect an RMS voltmeter in its place. Do not disconnect the 50 Ω termination. Divide the reading of the RMS voltmeter by 10. The result should not exceed the RMS limits of • 1 mVRMS for U8031A and U8032A, and • 2 mVRMS for Output 3.
Calibration Procedures Performance Verification Tests 1 Figure 1-6 Graph of load transient response Constant current (CC) verification Current programming and readback accuracy This test is to verify that the current programming and readback accuracy are within published specifications. The accuracy of the current monitoring resistor must be 0.1% or better. Procedure: 1 Power off the power supply, and connect a 0.
1 Calibration Procedures Performance Verification Tests 5 Wait for a few seconds for the output of the power supply to settle. Ensure that the power supply is in the CC mode. 6 Divide the voltage drop (DMM reading) across the current monitoring resistor (RM) by its resistance to convert it to ampere and record this value (IO). This value should be within the limit of 0 A ± 15 mA. 7 When the power supply is in the meter mode, record the current reading shown on the power supply.
Calibration Procedures Performance Verification Tests 1 CC load effect (load regulation) This test measures the immediate change in the output current resulting from a change in the load from the full rated output voltage to a short circuit. Procedure: 1 Power off the power supply, and connect the output to be tested as shown in Figure 1- 2 with the multimeter connected across the 0.01 Ω current monitoring resistor (RM). 2 Power on the power supply.
1 Calibration Procedures Performance Verification Tests CC source effect (line regulation) This test measures the change in the output current that results from a change in the AC line voltage from the minimum value to the maximum value. Procedure: 1 Power off the power supply, and connect the output to be tested as shown in step 1- 2 with the multimeter connected across the current monitoring resistor (RM). 2 Connect the AC power line through an AC voltage source.
Calibration Procedures Performance Verification Tests 1 9 Compare the reading obtained in step 7 and step 8. The difference should be within the limit of: • 3.2 mA for U8031A, and • 2.6 mA for U8032A. Line voltage, Vac Low line voltage limit, Vac High line voltage limit, Vac 100 90 110 115 104 127 230 207 253 CC noise CC noise is specified as the RMS output current in a frequency range 20 Hz to 20 MHz with the power supply in the CC operation.
1 Calibration Procedures Performance Verification Tests 6 Configure the differential amplifier as follows. • Enable the AC mode (positive and negative) to remove the DC component • Enable the differential mode • Set the gain to ×10 • Set the attenuation to 1 • Set the low- pass filter to 20 MHz bandwidth limit to filter out input signals that contain higher frequencies • Enable the zero precision voltage generator • Set input impedance to 50 Ω 7 Configure the RMS voltmeter as follows.
Calibration Procedures Performance Test Record for U8031A 1 Performance Test Record for U8031A Table 1-2 U8031A CV performance test record Specifications Test description Actual result Upper limit Lower limit Output 1 +0.015 V –0.015 V Output 2 +0.015 V –0.015 V Output 3 +0.25 V –0.25 V Output 1 DVM + 0.010 V DVM – 0.010 V Output 2 DVM + 0.010 V DVM – 0.010 V Output 1 30.090 V 29.910 V Output 2 30.090 V 29.910 V Output 3 5.25 V 4.75 V Output 1 DVM + 0.085 V DVM – 0.
1 Calibration Procedures Performance Test Record for U8031A Table 1-2 U8031A CV performance test record (continued) Specifications Test description Actual result Upper limit Lower limit CV line regulation Output 1 <5 mV Output 2 <5 mV Output 3 ≤5 mV CV ripple/noise Output 1 ≤10 mVPP, ≤1 mVRMS Output 2 ≤10 mVPP, ≤1 mVRMS Output 3 ≤50 mVPP, <2 mVRMS Load transient response time Output 1 <50 μs Output 2 Table 1-3 U8031A CC performance test record Specifications Test description Actual resu
Calibration Procedures Performance Test Record for U8031A 1 Table 1-3 U8031A CC performance test record (continued) Specifications Test description Actual result Upper limit Lower limit Output 1 6.033 A 5.967 A Output 2 6.033 A 5.967 A Output 1 Io + 0.0250 A Io – 0.0250 A Output 2 Io + 0.0250 A Io – 0.0250 A CC programming accuracy @ full scale (Io) CC readback accuracy @ full scale CC load regulation Maximum change: Output 1 <3.2 mA Output 2 <3.
1 Calibration Procedures Performance Test Record for U8032A Performance Test Record for U8032A Table 1-4 U8032A CV performance test record Specifications Test description Actual result Upper limit Lower limit Output 1 +0.015 V –0.015 V Output 2 +0.015 V –0.015 V Output 3 +0.25 V –0.25 V Output 1 DVM + 0.010 V DVM – 0.010 V Output 2 DVM + 0.010 V DVM – 0.010 V Output 1 60.165 V 59.835 V Output 2 60.165 V 59.835 V Output 3 5.25 V 4.75 V Output 1 DVM + 0.165 V DVM – 0.
Calibration Procedures Performance Test Record for U8032A 1 Table 1-4 U8032A CV performance test record (continued) Specifications Test description Actual result Upper limit Lower limit CV line regulation Output 1 <8 mV Output 2 <8 mV Output 3 ≤5 mV CV ripple/noise Output 1 ≤10 mVPP, ≤1 mVRMS Output 2 ≤10 mVPP, ≤1 mVRMS Output 3 ≤50 mVPP, <2 mVRMS Load transient response time Output 1 <50 μs Output 2 [1] DVM: Digital Volt Meter Table 1-5 U8032A CC performance test record Specifications T
1 Calibration Procedures Performance Test Record for U8032A Table 1-5 U8032A CC performance test record (continued) Specifications Test description Actual result Upper limit Lower limit Output 1 3.024 A 2.976 A Output 2 3.024 A 2.976 A Output 1 Io + 0.0175 A Io – 0.0175 A Output 2 Io + 0.0175 A Io – 0.0175 A CC programming accuracy @ full scale (Io) CC readback accuracy @ full scale CC load regulation Maximum change: Output 1 <2.6 mA Output 2 <2.
Calibration Procedures Using the Front Panel for Adjustments 1 Using the Front Panel for Adjustments This section describes the procedures to perform voltage and current adjustments (calibrations) from the front panel of the power supply. Calibration procedure NOTE Review the “Test Considerations” before beginning the calibration procedure. 1 Press and hold the [Memory] button when powering on the power supply to begin the calibration procedure.
1 Calibration Procedures Using the Front Panel for Adjustments 3 Voltage calibration low point: • The M1 annunciator turns on. • Use the knob to enter the reading obtained from the DVM. • Press the [Memory] button to save the value. • The calibration proceeds to the next calibration point. 4 Voltage calibration high point: • The M2 annunciator turns on. • Use the knob to enter the reading obtained from the DVM. • Press the [Memory] button to save the value.
Calibration Procedures Using the Front Panel for Adjustments 1 • Ensure that the output is in the CC mode, otherwise the CV annunciator for Output 1 will blink and the calibration will not proceed. 3 Current calibration low point: • The M1 annunciator turns on. • Use the knob to enter the calculated value (the DVM reading divided by the shunt resistance). • Press the [Memory] button to save the value. • The calibration proceeds to the next calibration point.
1 Calibration Procedures Using the Front Panel for Adjustments • Output 2 is enabled. The OFF annunciator turns off. • Ensure that the output is in the CV mode, otherwise the CC annunciator for Output 2 will blink and the calibration will not proceed. 3 Voltage calibration low point: • The M1 annunciator turns on. • Use the knob to enter the reading obtained from the DVM. • Press the [Memory] button to save the value. • The calibration proceeds to the next calibration point.
Calibration Procedures Using the Front Panel for Adjustments 1 2 Press the [Memory] button. • Output 2 is enabled. The OFF annunciator turns off. • Ensure that the output is in the CC mode, otherwise the CV annunciator for Output 2 will blink and the calibration will not proceed. 3 Current calibration low point: • The M1 annunciator turns on. • Use the knob to enter the calculated value (the DVM reading divided by the shunt resistance). • Press the [Memory] button to save the value.
1 Calibration Procedures Using the Front Panel for Adjustments Toggling between channels and calibration modes To select the output channel for calibration, press the [1] or [2] button. When the output channel is changed, the calibration will always start with the voltage calibration mode. During the calibration, pressing the [Voltage/Current] button will toggle between the voltage calibration mode and current calibration mode.
Calibration Procedures List of Error Codes 1 List of Error Codes The following errors indicate failures that may occur while operating the power supply.
1 Calibration Procedures List of Error Codes Table 1-7 List of power channel error codes (continued) 36 Error code Description 113 Failed to calibrate OCP 119 Analog board unknown error 120 Over temperature 130 Failed EEPROM test 131 Failed voltage +15 V 132 Failed voltage +5 V 133 Failed voltage +2.
U8030A Series Triple Output DC Power Supply Service Guide 2 Service and Maintenance Troubleshooting 38 Line Voltage Conversion 39 Self-Test Procedure 40 Returning the Instrument for Service 41 Replaceable Parts 42 To order replaceable parts 43 Types of Service Available 44 Extended service contracts 44 Obtaining Repair Service (Worldwide) 45 This chapter will help you troubleshoot a failing instrument. It also describes how to obtain repair services and lists the replaceable assemblies.
2 Service and Maintenance Troubleshooting Troubleshooting WA R N I N G To avoid electrical shock, do not perform any service unless you are qualified to do so. This section provides a brief check list of the common failures. Before troubleshooting or repairing the power supply, make sure that the failure is in the instrument rather than any external connections. Also make sure that the instrument is accurately calibrated. The table below will assist you in identifying some basic malfunctions.
Service and Maintenance Line Voltage Conversion 2 Line Voltage Conversion WA R N I N G SHOCK HAZARD Operating personnel must not remove power supply covers. Component replacement and internal adjustment must be made only by qualified service personnel. Line voltage conversion is accomplished by adjusting one component: the line voltage selection switch. To convert the supply from one line voltage option to another, proceed as follows. 1 Turn off the power supply, and disconnect the power cord.
2 Service and Maintenance Self-Test Procedure Table 2-2 Line voltage fuse rating indicator for U8031A/U8032A Fuse Rating: 47-63 Hz 600 VA ~ Line 100 V 1.0 AT 115 V 230 V NOTE The authorized personnel will mark the fuse rating indicator printed on the rear panel each time the fuse is changed. Self-Test Procedure Power-on self-test Each time the power supply is powered on, a set of self- tests is performed.
Service and Maintenance Returning the Instrument for Service 2 Returning the Instrument for Service Before shipping your instrument for repair or replacement, Agilent recommends that you acquire the shipping instructions from the Agilent Technologies Service Center. A clear understanding of the shipping instructions is necessary to secure your product for shipment.
2 Service and Maintenance Replaceable Parts Replaceable Parts This section contains information for ordering replacement parts for your instrument. You can find the instrument support part list in the Agilent's Test & Measurement Parts Catalog at http://www.agilent.com/find/parts Table 2- 3 include a brief description of each part with the applicable Agilent part number. Table 2-3 Replaceable parts for U8031A/U8032A Part number 2110-1504 42 Description FUSE 1 A 250 V TIME-DELAY 0.0757-OHM 20 × 5.2 × 5.
Service and Maintenance Replaceable Parts 2 To order replaceable parts You can order replaceable parts from Agilent using the Agilent part number. Note that not all parts listed are available as field- replaceable parts. To order replaceable parts from Agilent, do the following: 1 Contact your nearest Agilent Sales Office or Service Center. 2 Identify the parts by the Agilent part number shown in the support parts list. 3 Provide the instrument model number and serial number.
2 Service and Maintenance Types of Service Available Types of Service Available If your instrument fails during the warranty period, Agilent Technologies will repair or replace it under the terms of your warranty. Extended service contracts Many Agilent products are available with optional service contracts that extend the covered period after the standard warranty expires.
Service and Maintenance Obtaining Repair Service (Worldwide) 2 Obtaining Repair Service (Worldwide) To obtain service for your instrument (in- warranty or under service contract), contact your nearest Agilent Technologies Service Center. They will arrange to have your unit repaired or replaced, and can provide warranty information where applicable.
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